Pushrods keep bendind
Thread Starter
|
New User
Joined: May 2012
Posts: 13
Likes: 0
Pushrods keep bendind
a friend of mine has a 1996 ford f150 2wd with a 302, he recently took it in to have new head gaskets put in, a week after he got it back it started to act up and the top end of the motor was knocking, he took it back to the shop and they said it was a bad lifter, they took it apart and replaced 2 lifters and 2 push rods that were bent, after he got it back it ran good for a week or so then started acting up again, he took it back and they said it was a lifter again, they took it apart an found 2 more bent pushrods and 2 broken rocker arms, what would cause this to keep happening.
Postmaster
Joined: Oct 2008
Posts: 3,026
Likes: 0
From: Renton, WA
Tough one, they ONLY replaced the head gaskets, didn't take the head apart?
Was the head milled, did they take it to a machinist?
Was it the same 2 valves again?
I would guess that somehow in all that was done a couple valve stems got bent causing them to bind up some and overstress the lifters/pushrods.
Was the head milled, did they take it to a machinist?
Was it the same 2 valves again?
I would guess that somehow in all that was done a couple valve stems got bent causing them to bind up some and overstress the lifters/pushrods.
Postmaster
Joined: Oct 2008
Posts: 3,026
Likes: 0
From: Renton, WA
But is it the same 2 valves? You said on 2 occasions they had to replace parts on 2 valves, which 2 and were they the same 2 on both occassions?
Senior User
Joined: Oct 2004
Posts: 264
Likes: 0
From: Las Vegas
a friend of mine has a 1996 ford f150 2wd with a 302, he recently took it in to have new head gaskets put in, a week after he got it back it started to act up and the top end of the motor was knocking, he took it back to the shop and they said it was a bad lifter, they took it apart and replaced 2 lifters and 2 push rods that were bent, after he got it back it ran good for a week or so then started acting up again, he took it back and they said it was a lifter again, they took it apart an found 2 more bent pushrods and 2 broken rocker arms, what would cause this to keep happening.
At the onset of this problem...why did your friend have the head gaskets replaced? Water in oil, low compression, wouldn't run, etc.
If he troubleshot it down to head gaskets, how did he come to that conclusion?
If we start at the beginnig, we may be able to figure out how he got to this point.
Thread Starter
|
New User
Joined: May 2012
Posts: 13
Likes: 0
It seems like some info is missing here.
At the onset of this problem...why did your friend have the head gaskets replaced? Water in oil, low compression, wouldn't run, etc.
If he troubleshot it down to head gaskets, how did he come to that conclusion?
If we start at the beginnig, we may be able to figure out how he got to this point.
At the onset of this problem...why did your friend have the head gaskets replaced? Water in oil, low compression, wouldn't run, etc.
If he troubleshot it down to head gaskets, how did he come to that conclusion?
If we start at the beginnig, we may be able to figure out how he got to this point.
Trending Topics
Senior User
Joined: Oct 2004
Posts: 264
Likes: 0
From: Las Vegas
If nothing else but the head gaskets were replaced, and all parts were reinstalled in the correct position, then nothing should have changed. By that I mean the distance the valves are opening.
If however, when the heads were removed and all the parts were just thrown into a box and not properly identified then the push rods/rocker arms are most likely going to be missed matched.
Could mismatched parts make a difference? I would think the differences would be so small that it wouldn't really matter....but maybe it does.
My Ford maunal basically says during removal identify all parts and for assembly reinstall them in the orginal position and oriention. It goes on to say that if parts are replaced then check valve clearance and if necessary install a longer or shorter pushrod. There is also a procedure to identify the correct lengths pushrods.
My manual doesn't give a pushrod length...maybe someone could chime in with the stock lenght as a good starting point.
Anyway, I hope this helps.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
Thread Starter
|
New User
Joined: May 2012
Posts: 13
Likes: 0
he took it to another shop, they took it apart and found that it the pushrods they replaced were and odd size, they went ahead and replaced all pushrods and lifter with the right ones, he got it back today and its running good now
Thread
Thread Starter
Forum
Replies
Last Post
Eh1992xlt
1987 - 1996 F150 & Larger F-Series Trucks
7
Sep 29, 2017 10:17 PM
Myfreeford
Big Block V8 - 385 Series (6.1/370, 7.0/429, 7.5/460)
4
Dec 3, 2011 01:10 PM
crashem300
1987 - 1996 F150 & Larger F-Series Trucks
4
May 20, 2011 02:40 PM
8525ford
Ford Inline Six, 200, 250, 4.9L / 300
12
Jul 10, 2010 06:35 PM
